Explosive specific force trough small sided games and few players?: part 3.

After seeing the relationship between the acceleration and deceleration phases of a near maximum sprint with hard change of direction (180º), and how it affects to the metabolic power (Di Prampero approach) and mechanic power (Bezodis approach), now is time to go one step forward.
In order to try to clarify this relationship between acceleration and deceleration phases of similar actions, I propose you this simple analysis in which we compare the impulse phase (acceleration) of a typical squat jump (just body weight, without extra load) with the braking phase (deceleration) of a traditional drop jump from 40 cm, as Verkhoshansky originally proposed it (fall down from a height and stop the movement as fast as possible, with no jump after). Both jumps has been performed by the same soccer player with maximum intensity (trying to jump as high as possible in an explosive movement, and to brake as fast as possible the falling down).
The intention is to try to show the typical characteristics of the relationship between maximal acceleration and maximal deceleration in a simple movement.

Enjoy, and stay tuned!!!

Explosive specific force trough small sided games and few players?: part 2.

In this second part, I will show you some data of the speed, acceleration, and also metabolic power (based on Di Prampero approach) and horizontal mechanical power (based on Bezodis proposal) demonstrated by a soccer player in a simple and analytic exercise of a 5+5+16+16m changing direction sprint, with some comments about their relationship.

Enjoy,

Explosive specific force trough small sided games and few players?: part 1.

After the introduction, we continue with this very interesting issue, in which after some more basic general data, you will see a first analysis of an ... better you see it!

Enjoy!

Explosive specific force trough small sided games and few players?: Intro

As commented in the last post, I have prepared a presentation about the issue of the development of the specific explosive force using small soccer sided games with just few players participating.
I think this is one of the usual mistakes we do when talking about specificity of the tasks for the development of the specific explosiveness: to interpret that as we are using less space (pitch dimension), we have less time to act, so less time means more explosiveness ... then small sided games with few players are the correct task for developing specific explosive strength. In fact this is clear for the decision making, but what happens with the force demonstration (as we are talking about explosive strength)?

On one side, we need the quality of the stimulus specifically oriented towards the explosiveness, and on the other side, we need the correct quantity of this stimulus, in order to be able to cause a change in the desired direction.

So lets start with this very interesting issue, in order to clarify not only the concept, but also to establish the correct basis for being able to progress in our understanding of how to modify and optimize our training methodology.

Enjoy,

Effects of an "extra" contralateral mechanical load and its detection, based on triaxial accelerometer data.

This is going to be the last video related with the contralateral acceleration pattern (for the time being), and in I will explain a recent personal situation in which I was acting as a player during a training session of the amateur soccer team of my city, FC Cambrils (Tarragona, Spain). During this session, we have done some traditional warm up based just on running (no comments at all, please), and then we have combined some possession game (6+6)x6 with some physical-technique circuit in which we have used some extra lateral side cutting step (so a lot of lateral and diagonal decelerations).

During the last part of the session and also later at home, and next morning, I have been feeling some "little pain" that I thought was caused by this "extra lateral load", so when analyzing the GPS data of this session I have going directly to see if it was any sign or possible relationship with A3X data, specially on the contralateral axis (you will see it in red color).

Here it is what I have seen. ¿What do you think about?

Moreover, and after some interesting debate with some colleagues (in a conference in Vigo that coach Victor Muñoz and myself have been doing two days ago) and friends also working in different soccer teams here in Spain and also abroad, and also after reading some positioning about the issue, I have prepare the next videos for the blog in which the title (so the issue) will be:
"Explosive specific force trough small sided games and few players?"

Stay tuned!!!

Detecting functional contralateral deficits in acceleration (force) pattern in soccer players: hamstrings overload and knee pain.

We are going to see today more data from a veteran amateur player suffering from hamstrings overload (so feeling pain on the proximal insertion of his hamstrings) and also with some more pain on his knee (in this case coming from some articular problems).

After starting this issue on the last posts, I have receive quite a lot of questions about it. As I did advice then, the only thing I'm showing is just that in the cases in which I have been able to detect any short of contralateral functional deficit, there are also some relationship with different short of injuries or pain. But when colleagues and friends ask me if I'm able to detect possible future injuries, the answer is clear: NO.
But with some more time and more data, I'll try to analyze the possible relationship between triaxial accelerometer data and injury prevention. I'll keep you informed.

Enjoy,

Detecting functional contralateral deficits in acceleration (force) pattern in soccer players: chronic groin injury.

This another example from an amateur spanish soccer player from FC Cambrils (Tarragona), in which after an standard training session and the corresponding analysis, we have detected some contralateral functional deficit in the acceleration (force) pattern on different axes, but specially in the contralateral one. After detecting it, I have ask the player if he was suffering any special problem, injury or whatever, and the answer has been that after some months, he is suffering from a chronic groin injury.

Hope you enjoy,